Sure, no problem at all. I got an e-mail from someone on the admissions committee saying he wanted to speak to me about my application over the phone. He asked me a couple of questions about some points in my application (all of which were very specific to my app, so it doesn't seem as if he had any pre-established list of questions he was supposed to ask) and proceeded to talk to my about the program and how it might fit with my interests. He followed up with an e-mail a few days later saying the adcom had met to discuss my application and that he wanted to speak with me again to ask about a few even more specific points so that he could "write a letter on my behalf" (not sure if this is to the committee as a whole or to the Graduate School) and to talk about a burgeoning interdisciplinary research field at the school that might fit with my interests. In any event, I'm still awaiting the second call, but it's starting to look positive (although I don't want to get my hopes totally up).
Reading through last year's thread, it appears that the same thing happened to someone at the end of January as well. Given that so few of the people who applied to Berkeley last year were on this forum, it's tough to figure out whether these "interviews" are a normal part of the process or not. In any event, I hope both of our applications can get through, so best of luck! Until then, the sanity-crushing waiting continues...